🌐EnglishEnglishItalianoPortuguêsРусскийالعربيةEntityQ17022147· pop 6· linked from 172 articlesHeesch's problemAlso known as Heesch numberon surrounding polygons by layers of copiesAvailable in 6 languagesРусскийPortuguêsItalianosimpleUkrainianvia Wikidata sitelinks · CC0Connectionslist of regular polytopesEntityWang tileEntityCategoriesTessellationUnsolved problems in geometry